Water-soluble sizing agent, preparation method thereof and application of water-soluble sizing agent to surface modification of fibers

The invention relates to the technical field of sizing agents for fibers, in particular to a water-soluble sizing agent, a preparation method of the water-soluble sizing agent and application of the water-soluble sizing agent to surface modification of fibers. The present invention provides a water-soluble sizing agent, in which the sizing agent comprises modified polyetheretherketone and water, the modified polyetheretherketone is grafted with hydroxymethyl, aminomethyl, carboxymethyl, and a protonated amine ion salt, and the water solubility and thermal stability of the polyetheretherketone can be improved, so that when the modified polyetheretherketone is applied to the sizing agent, the water solubility and thermal stability of the polyetheretherketone can be improved. The obtained sizing agent has the advantages of environmental friendliness, good water solubility and high temperature resistance. 本发明涉及纤维用上浆剂技术领域，具体涉及一种水溶性上浆剂及其制备方法和对纤维进行表面改性的应用。本发明提供一种水溶性上浆剂，其中，所述上浆剂包含：改性聚醚醚酮和水，在改性聚醚醚酮中接枝了羟甲基、氨甲基、羧甲基、质子化胺